diff --git a/include/PR/rcp.h b/include/PR/rcp.h
index 840a2f88..e092bf06 100644
--- a/include/PR/rcp.h
+++ b/include/PR/rcp.h
@@ -24,7 +24,7 @@
  *
  **************************************************************************/
 
-#include <PR/r4300.h>
+#include <PR/R4300.h>
 #include <PR/ultratypes.h>
 
 /**********************************************************************